#ifndef __LIB_CTYPE_H
#define __LIB_CTYPE_H

static inline int islower(int c) { return c >= 'a' && c <= 'z'; }
static inline int isupper(int c) { return c >= 'A' && c <= 'Z'; }
static inline int isalpha(int c) { return islower(c) || isupper(c); }
static inline int isdigit(int c) { return c >= '0' && c <= '9'; }
static inline int isalnum(int c) { return isalpha(c) || isdigit(c); }

static inline int isxdigit(int c)
{
    return isdigit(c) || (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F');
}

static inline int isspace(int c)
{
    return (c == ' ' || c == '\f' || c == '\n' || c == '\r' || c == '\t' || c == '\v');
}

static inline int isblank(int c) { return c == ' ' || c == '\t'; }
static inline int isgraph(int c) { return c > 32 && c < 127; }
static inline int isprint(int c) { return c >= 32 && c < 127; }
static inline int iscntrl(int c) { return (c >= 0 && c < 32) || c == 127; }
static inline int isascii(int c) { return c >= 0 && c < 128; }

static inline int ispunct(int c)
{
    return isprint(c) && !isalnum(c) && !isspace(c);
}

static inline int tolower(int c) { return isupper(c) ? c - 'A' + 'a' : c; }
static inline int toupper(int c) { return islower(c) ? c - 'a' + 'A' : c; }

#endif /* lib/ctype.h */
